of the component parts of the Blood. 
9 
EXPLANATION OF THE PLATES. 
PLATE I. 
Contains three figures ; the first exhibits a transverse section 
of an aneurismal coagulum of the natural size ; the other two 
represent the salts of the blood in a crystallized state, mag- 
nified five diameters. 
Fig. l. This section represents that part of the coagulum 
which lay in the bottom of the sac. It shows the different 
shades of colour of the layers according to their length of 
standing, and the crystallized salts in different parts of the 
coagulum. 
Figs. 2 and 3. Different views of these crystals. 
PLATE II. 
Represents sections of a tumor taken from a patient in St. 
George's Hospital : there are seven figures.* 
Fig. 1. The surface of the section of the natural size; one 
part is colourless ; another appears to be very vascular. 
* The following is an account of the case. The tumor was perceived when 
of the size of a pea : in six months it increased to that of an orange : in fourteen 
days more it doubled that size. Arsenic, 48 grs. to ^i. of water, was applied once 
in twenty-four hours for two days. The pain was too great to allow it to be renewed 
In ten days the application was taken off, and the tumor was black and shrunk, 
but not dead to any depth. Equal parts of white arsenic and sulphur were applied 
once in twenty-four hours for two days : the pain was excessive. In fourteen days, 
one half of the tumor came away. The remaining surface resembled a coagulum ' 
of blood, soft and dark coloured. This came away next day, eight months and a 
half from the first appearance of the tumor. This last is the tumor of which a 
section is represented. The drawing was made twenty-four hours after it was 
removed, in which time it had undergone no change. 
MDCCCXX. C 
